One hundredth of a ton =5 kg
5÷25= one fifth (kg) =200 grams.
Licun planted 20 hectares of peanuts this year, including four fifths of corn and three fourths of soybean. How many hectares of soybeans are planted?
20× 3/4 = 15 (hectare)
There are 90 sixth-grade students in bright primary school, which is one sixth less than that in fifth grade. How many students are there in Grade Five?
90÷ (1-1/6) =108 (person)